Piston-ring tool



April 5 1927.

r J. MCCARTHY PISTON RING TOOL Filed May 15, 1926 Patented Apr. 5, 1927.

N! TED 5 TA TIES 1,623,7%9 {PATENT orrics.

J'QSEI I-I P. MCCARTHY, OF U-TIC-A, NEW" YORK, ASSIGIIOR OF ONE-THIRD TO W'ILLIA Tv CLEVELAND AND ONE-THIRD TO PETER SAWICK, BOTH 0F 'U'TICA, NEW YGRIK.

BISTON-RING ILOOL.

Application filed May 15,

This invention relates to new and useful improvements .in piston ring tools, and has for one of its objects the provision of a tool which is particularly adapted for use in placing piston rings in the piston and the entirety in the cylinder.

Another object of the invention is to provide a tool which is in the form of a sleeve for surrounding the piston ring or rings, the lower end of the sleeve being formed with an upwardly and outwardly beveled portion whereby the sleeve will fit within the beveled upper end of the cylinder and there by insure the passing of the piston with the rings attached thereto into the cylinder.

Another object of the invention is to provide a sleeve for the purpose set forth which is constructed with a plurality of longitudinally disposed sections having their upper ends secured by links to a ring of larger diameter, whereby said sections may be readily positioned in close contact with the wall of the piston throughout the lengths of said sections, to thereby cause the links to be properly compressed within the channels of the piston ringwhile the entirety .is being positioned within the bore of the cylinder.

A still further object of the invention lies in the provision of asleeve of the type described in which an expansible member is associated with the lower ends of the sections so as to permit the sleeveto be readily adapted to cylinders of different diameters.

Another object of the invention is to provide a piston ring tool of the character described in which the expansible member is constructed with means for varying its expansibility, whereby the tool may be readily adapted for pistons of extreme diameters.

With the foregoing and other objects and advantages in View as will be evident fron the subsequent description, the invention consists in the construction and arrangement of the several parts as will be more fully hereinafter described and claimed.

In the accompanying drawings:

Figure 1 is a vertical sectional View of a cylinder and piston and showing the application of my invention thereto;

Fig. 2 is an enlarged top plan View of my invention Fig. 3 is a detail plan View, the sections of the sleeve being shown in section, the view showing particularly the connection-between the ends of the expansible coiled spring, and

1926. Serial Ive-1093369.

Fig. 4 is an enlarged detailsectional view through the spring, showing the means for rings 10 in the grooves 9 while the piston is being inserted within the bore '6, I have provided a sleeve A which is radially adjustable to fit against the periphery of the piston. This sleeve comprises a ring 11, a plurality of longitudinally extending sections 12, and a plurality of links 13, the latter respectively connecting the sections 12 with the ring 11. The lower ends of the sections 12 are respectivelyoutwardly and upwardly inclined to fit within the bevel 7 of the cylinder bore,

and to this end the lower end of each section 12 is sharply bent upwardly and outwardly, as indicated at 14-, the upturn-ed portionsof said sections being thence curved upwardly and inwardly to form seats 15. Disposed within the seats .15 is an eXpa-nsible member B which in this instance is formed from a single length of coiled spring, the ends thereof being formed into inter-engaging hooks 16 and 17, respectively. The length of the spring is such as to cause the sections 12 of the sleeve A to properly fit a standard size cylinder. It. may be desirable to employ the improved tool on a cylinder of less-er diameter, and to this end I have provided a take-up means in the coiled spring whereby its eXpa-nsibility may be varied. For this purpose I have provided a take-up member within one end of the spring. This take-up member, as specifically illustrated, consists of a V-shaped link 18 having its ends 1919 looped about a convolution of the spring at a point some distance from the end of said spring. A second link 20 is pivotally connected to the apex of the V-shaped link and the outer end of this link 20 projects beyond the adjacent end of the spring and is formed with an eye 21, which is adapted for engagement with the hook 16 whenever it is desired to reduce the The piston is provided I Hit) expansibility of said coil. It will also be noted that by reducing the expansibility of this coil, a greater tension is thereby created. It will be further observed that after the rings have been inserted in the grooves and the sleeve positioned around the rings, a downward movement on the ring 11 will force the sections 12 of the sleeve A inwardly towards the piston and thereby firmly conipress the piston rings within their respective grooves and hold said piston rings in said grooves while the piston is being inserted within the bore of the cylinder.

It will be obvious that changes in the proportions and dimensions of the several parts may be adopted without departing from the spirit or scope of the invention as set forth in the appended claims.

claim-2 In a piston ring tool, the combination of a sleeve formed by a ring and a plurality of longitudinally extending sections pivoted at their upper ends to said ring, the lower ends of said sections being outwardly and upwardly inclined to fit within the beveled upper end of the cylinder bore and expansible means surrounding the sections directly above said upwardly inclined lower ends.

2. In a piston ring tool, the combination of a sleeve formed by a ring, a plurality of links pivotally connected to said ring, a plurality of longitudinally extending sections respectively pivoted at their upper ends to said links, and expansible means surrounding the lower ends of said sections.

3. In a piston ring tool, the combination of a sleeve formed by a ring, a plurality of links pivotally connected to said ring, a plurality of longitudinally extending sections respectively pivoted at their upper ends to said links, the lower ends of said sections being outwardly and upwardly inclined to lit within the beveled upper end of the cylinder bore, and expansible means surrounding the lower ends of said sections.

In a piston ring tool, the combination of a sleeve formed by a ring and a plurality of longitudinally extending sections pivoted at their upper ends to said ring, the lower ends ot said sections being sharply bent upwardly and outwardly to respectively form beveled lower ends to fit within the beveled upper end of the cylinder bore.

In a piston ring tool, the combination of a sleeve formed by a ring and a plurality of longitudinally extending sections pivoted at their upper ends to said ring, the lower ends of said sections being sharply bent upwardly and outwardly to respectively form beveled lower ends to lit within the beveled upper end oi the cylinder bore, the upturned portions ct said sections being curved upwardly and inwardly to term seats, and. an endless coil spring fitted within said seats.

6. In a piston ringtool, the combination of a sleeve formed by a ring and a plurality ct longitudinally extending sections pivoted at their upper ends to said ring, and an e2- pansible ring surrounding the lower ends of said sections, said ring being formed from a coil spring having interengaging hooks at its ends, and a take-up member disposed within the coil, one end thereof being coni nected to the coil at a point removed from one end thereof and having an eye project ing from said end for engagement with the book of the opposite end of the coil.

7. In a piston ring tool, the combination of a sleeve formed by a ring and a plurality of longitudinally extending sections pivoted at their upper ends to said ring, and an expansible ring surrounding the lower ends of said sections, said ring being formed from a coil spring having int-erengaging hooks at its ends, and a take-up member disposed within the coil, and comprising a link havone end connected to the coil at a pointremoved from one end thereof, and ahook pivoted at its inner end .to said link and adapted for engagement with the heel: of the opposite end of the coil. 7

In testimony whereof I hereunto affix my signature.

JOSEPH P. h iCCARTI'lY. 

